Fellou
Silicon Valley. Spatial agentic browser with explicit Agentic Memory layer learning from history and notes for instant recall of past research sessions. Operates on logged-in accounts (Quora, X, etc.); runs tasks while user is idle.
Active · Verified 2026-10-22 · fresh as of 2026-10-22 · 43 cited facts, 0 with a third-party source · 1 recorded change · Suggest a correction
At a glance
- Type
- Spatial agentic browser + Agentic Memory vendor fix
- Tier
- T1
- Section
- Browser-agent memory
- Latest release
- not applicable — not OSS fix
- License
- not applicable — not OSS fix
- GitHub
- not applicable — no GitHub repo fix
- Pricing
- Free (1,000-Spark bonus); Plus $19/mo; Pro $39.90/mo; Ultra $199.90/mo (annual ~20% off) vendor fix
- Funding
- $40M total Seed/Series A · 2025-01 vendor fix
- Freshness
- 2026-10-22 fix
- Layer
- agent-infra repo fix
- Licensing
- commercial vendor fix
- Deployment locus
- computer-use vendor fix
Memory taxonomy
- storage
- proprietary
- retrieval
- agentic
- persistence
- long-term
- update
- agent-controlled
- unit
- trajectory
- governance
- opaque
- conflict
- none
When to use
Optimised for: spatial agentic browser + Agentic Memory
Anti-fit: not for enterprise / managed environments (early)
Pros & cons
Pros
Agentic browser with first-class memory of past task trajectories, not just URLs visited.
Cons
New entrant with limited track record; sustainability depends on funding traction.
Claims & capabilities
$40.4M raised. 1M+ users since April 2025 launch.
Technical surface
- API surface
- not applicable — consumer browser
- Backend storage
- custom
- Deployment
- Managed-only (browser app)
- Embedding model
- locked
- Multi-tenancy
- hard-isolation
- MCP
- searched not found
- A2A
- searched not found
- OpenTelemetry
- searched not found
Compare Fellou with…
Alternatives to Fellou → live options ranked by shared design, licence, hosting and MCP support
Similar systems
Other browser-agent memory in the catalog, ranked by inbound references.
- Browserbase T1
Cloud browser infrastructure for AI agents. Headless Chromium sessions with persistent cookies, localStorage, session recording — agent workflows carry state across runs. Memory at the session/automation tier rather than conversational.
- Brave Leo T2
Privacy-focused integrated assistant. Memory is user-curated: explicit facts and preferences persist across all sessions, stored locally with no server retention. Agentic browsing experiment (Brave Nightly Dec 2025) takes multi-step actions inside sites referencing those preferences.
- Dia (Atlassian) T1
The Browser Company's AI-native browser; Atlassian acquired The Browser Company for $610M cash (announced 2025-09, closed 2025-10-21). Stores summaries and preferences locally; opt-in @history feature references up to 7 days of browsing as context. History/chats/bookmarks encrypted local-first.
- Microsoft Edge Copilot Mode + Journeys (now Copilot in Edge) T1
Copilot Mode retired 2026-05-13; its features now ship as Copilot in Edge. Journeys clusters browsing history into topic cards on the new tab page (desktop, and US mobile); Copilot long-term memory can reference past chats and browsing history with user controls; agentic 'Browse with Copilot' (formerly Copilot Actions) for US Microsoft 365 Premium.
- Opera AI (formerly Aria) T2
Memory feature stores user-declared preferences and facts; injected into future prompts. Understands current tab content; manages open tabs contextually. Memory off by default, end-user controlled, stored alongside the prompt rather than the LLM.
- Perplexity Comet T1
AI-native Chromium-based browser. Assistant operates across tabs and sessions; persistent memory of preferences; multi-step agentic tasks without leaving the browser. Memory is opt-in and server-side; enterprise memory tier separately available.
Sources (42 cited facts, 0 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Spatial agentic browser + Agentic Memory vendor
- What it does & what's distinct Silicon Valley. Spatial agentic browser with explicit Agentic Memory layer learning from… vendor
- Claims / benefits $40.4M raised. 1M+ users since April 2025 launch. vendor
- Modalities text + image vendor
- Created 2025-01 vendor
- Funding $40M total Seed/Series A · 2025-01 vendor
- Customers / scale 11-50 ppl 1M+ users, named enterprise customers not disclosed vendor
- Pricing Free (1,000-Spark bonus); Plus $19/mo; Pro $39.90/mo; Ultra $199.90/mo (annual ~20% off) vendor
- Deployment Managed-only (browser app) vendor
- HQ US (Silicon Valley) vendor
- Founders / pedigree LongRiver Investments; no founders publicly identified; $40M seed vendor
- Memory volume / scale no scale claim vendor
- Backend storage custom vendor
- Multi-tenancy hard-isolation vendor
- Encryption at-rest + in-transit vendor
- Embedding model locked vendor
- Validated verticals consumer / individual (early adopters) vendor
- Time to running <10min (download Fellou) vendor
- Anti-fit not for enterprise / managed environments (early) vendor
- Optimised for spatial agentic browser + Agentic Memory vendor
- Adjacent infrastructure self-contained Fellou vendor
- Pros Agentic browser with first-class memory of past task trajectories, not just URLs visited. vendor
- Cons New entrant with limited track record; sustainability depends on funding traction. vendor
- Project & sources fellou.ai vendor
- cost-token-budget no vendor
- cost-prompt-caching no vendor
- cost-semantic-caching no vendor
- cost-batching no vendor
- cost-model-routing no vendor
- cost-streaming-only no vendor
- cost-observability-cost-attribution no vendor
- eval-langsmith-evals no vendor
- eval-braintrust no vendor
- eval-weights-and-biases-agent no vendor
- eval-helicone-evals no vendor
- eval-custom-test-harness no vendor
- eval-human-loop no vendor
- eval-production-traffic-replay no vendor
- architecture-deployment-locus computer-use vendor
- licensing-bucket commercial vendor
- positioning-platform-vs-product product vendor
- taxonomy-three-layer-rollup agent-infra repo
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)